Pin-pulling device for drill sharpeners



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- LE ROY HICKS y PIN PULLING DEVICE FOR DRILL SARPENERS Filed April 12.,1921 52m, Y Y Ilm A W .1|lllllur-mrlu Huwj` Patented Dec. 25, i923.

ontrein stares LE ROY HICKS, OF LYON MGUNTAIN, NEV YORK.

PIN-PULLING DEVICE FOR DRILL SHARPENERS.

Application filed April 12, 1921. Serial No. 460,653.

T aZZ whom it may concern.'

Be it known that I, LE ROY Hicks, a citi-- zen of the United States,residing at Lyon Mountain, in the county of Clinton and State of NewYork, have invented certain new and useful Improvements in Pin-PullingDevices for Drill Sharpeners, of which the following is a specification.

The present invention relates to apparatus for removing pins from rockdrill sharpening machines, and consists in the combinations andarrangements of elements hereinafter described and particularly setforth in the accompanying claim.

The invention has for its purpose to provide a device which willeiectively remove the pin from a rock drill sharpening machine in a waywhich will cause no injury to the pin or machine in a quiet and easilyperformed manner.

A further purpose of the invention is to provide a device of thischaracter which will enable the operator of the machine to withdraw thepin' that has been inserted for keeping open the hole in the shank whilethe lugs are being formed, and thereby enable the operator to increasehis output.

The invention has for its further purpose to provide a machine capableof performing these functions which will take the place of the old handand foot power pin pullers and which will not require any high degree ofskill on the part of the operator.

The invention is disclosed by way of illustration in the accompanyingdrawing, wherein Figure 1 is a side elevational view of the machinecomplete; and

Figure 2 is a similar view of a modied construction.

Referring to the construction in further detail and wherein likereference characters indicate corresponding parts in the diierent viewsshown, 3 designates a suitable support or frame having anchor lugs 4 forrendering the machine stable; and the portions 5 and 6' of said frameprovide suitable guideways for the carrier or bar 7 that is slidablymounted therein. A pair of lbolts 8 or the like pass through slotsformed in the carrier 7 and serve to guide the same in its movements. ltwill be understood, of course, that the frame 3 may be itself supportedby another frame or structure of any suitable form. The drill shank 9here shown is of the type used on the Leynor machine and 10 designatesthe pin thereof that is to be removed.

The device per se for removing the pin consists of a cam or clamp 11that is pivotally mounted, as at 12, to the carrier 7 and a pendantweight 13, connected to said cam, operates to hold the same in suchposition that movement of the carrier in one direction will cause thepin 10 to be extracted from the drill shank, while movement in the otherdirection will allow the clamp or cam to move without a gripping action.

con

The means for operating the carrier or Y pulling bar 7 consists of arocker shaft 14 having an arm 15 carrying a link or reach rod 16 thatconnects with the arm 17 of the carrier, and by the arm 18 and link 19the rocker shaft is connected to be operated from the power source. Saidsource consists of a cylinder 20 having a piston .21 therein, whosepiston rod 22 connects with the link 19 as shown. The reciprocations ofthe piston are controlled by a suitable manually-actuated valve 23,whose controlling handle (not shown) is located within convenient reachof the operator.

The construction shown in Figure 2 is in all essentials the same as thatillustrated in Figure 1V and differs only in that the pin gripping cam24C is mounted on the upper side of the carrier or pull bar 25 asdistinct from on the under side, as in Figure 1; and in place of theform of rocker shaft 14 a rocker shaft 26 has two upright arms 27 and 28connecting respectively with links 29 and 30 that couple with the camcarrying bar and the piston rod 31.

The illustration shows a particular embodiment of the invention, thoughit is understood, of course, that the invention may be carried out inother ways, and that therefore the present disclosure is to beconsidered incan illustrative sense only and not as a limiting one.

Having thus described the invention, what is claimed is:

In an apparatus of the character described, the combination of asupporting structure, a guideway mounted on said structure, a carrierbar slidably mounted on the guide-Way, a rocker arm having a fixedfulcruin mounted on said structure, a link connecting said'rocker armwith the carrier bar,

and a. cam element mounted on the carrier bar provided with a pendantWeight operable to cause the com to positively funetion When the carrierbar is moved in one direction and to be released when the carrier 1U barmoves in the opposite direction.

In testimony whereof I aiix `my signature.

LE RoY HICKS.

